Nondesignated Port vs. Blocked Port

[laser]

Hello Everyone,

What is the difference between a Nondesignated Port and Blocked port?

Are they one and the same?
p. 507 in CCNA 6th ed.

Thank you kindly,
Al

PS: I'm so glad that Lammle actually participates in his forum. I'm a customer for life :)

[Big Evil]

Nondesignated port:Port with a higher cost than the designated port that will be put in blocking mode—a nondesignated port is not a forwarding port.

Blocked port: A blocked port is the port that will not forward frames, in order to prevent loops. However, a blocked port will always listen to frames.

Hope that helps.

[laser]

Thanks Big Evil for the response.

Doesn't that seem the same to anyone?

Thanks

[Big Evil]

Yes, i do.
They both block network traffic from taking that path so it can only access that segment through the designated port.

[laser]

Are they one and the same?

Thx

[Big Evil]

In STP a Nondesignated port, is refered to as being in blocking state.
A NDP is defined as a port on a nonroot switch that does not forward data, thus is will be said to be in "blocking state" and is the port that will break the loop. (You can have a few NDP on a LAN.)

The port is in blocking state when the boot up initialization is in progress. The ports then stabilize to the forwarding or blocking state and that (blocking state) does not participate in frame forwarding becoming the NDP.

[lammle]

Laser, thank for your kind words. I apprecaite it.
I am glad that BE was able to help you out.
Cheers!
Todd